I live in Oz and never heard of that law.
Today I found out from a pigeon vet that its illegal in my country to rehabilitate and release feral pigeons. I live in Australia. So basically, if an Australian were to ever help a feral pigeon, they'd have to keep it as a pet in cage for the rest of its life.
I can understand this law, insofar as some birds that recover from a serious disease such as Paratyphoid will be a carrier for life, infecting many other birds it associates with. But even with that understanding, I still feel very sad. Ferals get such a rough time of it. I mean people introduced them to Australia to make the country`feel more like England'. And we've basically abandoned them here and set up laws to make their care virtually impossible. I can't even legally obtain the drugs I need to help in emergencies.
As far as I'm concerned, we're just as feral as they are, and we are a whole lot more destructive towards our environment. Poor little guys.
HA!There's no reason why you can't release your pet pigeon back to your pet flock.